Management or control of environmental factors that are, or may be harmful to the health, growth, and survival of human beings, so that man is a complete body and mind free from diseases and can live happily in society.
Manage or control the environmental factors that are, or could be harmful to the health, growth and survival of human beings to a state of complete physical and mental illness-free. And can live happily in society.
Manage or control the environmental factors that are, or may harm the health growth and survival of human beings to the human condition, complete body and mind without the disease And can live happily in the society.